What happens if I forget the passphrase?

The text can't be recovered. There's no backdoor or reset because the key exists only in your passphrase.

Is this suitable for highly sensitive data?

It uses strong, standard cryptography, but security also depends on your passphrase strength and how you share it. Use long, unique passphrases.

Why does encrypting the same text give different output?

A new random salt and IV are used every time, which is a security feature. Decryption still works with the right passphrase.

Is AES Encrypt & Decrypt free to use?

Yes — AES Encrypt & Decrypt is completely free, with no registration, no usage limits and no watermarks.

Does this tool upload my files to a server?

No. All processing happens entirely in your browser — nothing is uploaded, stored or shared.

AES Encrypt & Decrypt

Encrypt and decrypt text with AES-256 using a passphrase.

AES is the encryption standard used by governments, banks and secure messaging apps.

About AES Encrypt & Decrypt

Encrypt text with AES-256-GCM using a passphrase, then decrypt it later with the same passphrase. The key is derived with PBKDF2 and each message gets a fresh random salt and IV, so the output is safe to share. Encryption uses your browser's built-in Web Crypto API and nothing is uploaded.

AES is the encryption standard used by governments, banks and secure messaging apps. This tool encrypts and decrypts text with AES-256 in GCM mode, deriving the key from your passphrase with PBKDF2 and using a fresh random salt and initialisation vector for every message. The output is a single Base64 string you can store or share, and only someone with the passphrase can read it.

How to use AES Encrypt & Decrypt

Choose Encrypt and enter a strong passphrase.
Type or paste the text you want to protect.
Copy the Base64 output.
To read it later, choose Decrypt, paste the Base64 text and enter the same passphrase.

Key features

AES-256-GCM authenticated encryption.
PBKDF2 key derivation with a random salt per message.
Tamper detection: wrong passphrases or edited text fail to decrypt.
Uses the browser's built-in Web Crypto API; nothing is uploaded.

Common use cases

Sharing a password or note over email or chat more securely.
Keeping a private snippet in a document or note-taking app.
Learning how modern authenticated encryption works.

Frequently asked questions

Related tools

Password Generator

Generate strong, random passwords with custom rules.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text.

SHA-256 Hash Generator

Generate the SHA-256 hash of any text instantly.

Bcrypt Generator & Checker

Generate bcrypt hashes and verify text against an existing bcrypt hash.